Digital & print resources available

IRIS offers a variety of resources for the
seismological community and general public
including online interactive materials,
regular newsletters, brochures,
webinars, past event materials. We also offer
digital copies of our proposals and reviews
for download.

Summary

The TA Infrasound Reference Event Database (TAIRED) is a user-supported evolving database that serves as a reference event depository where researchers can contribute new events, provide a new solution for an existing event and find sample infrasound events for their use.

Description

The TA Infrasound Reference Event Database (TAIRED) is a user-supported evolving database that serves as a reference event depository where researchers can contribute new events, provide a new solution for an existing event and find sample infrasound events for their use. This database was initially populated from observations on the USArray infrasound data, event bulletins, news on meteorological phenomena, explosions and rocket launches. Use the above download link to download the entire event database as a text file.

A series of parameters (description, date-time, latitude, longitude, altitude, event type, status level and author) are used to define each event/solution. The confidence in the source time, location and altitude of the events is given by time error (in seconds), location error (in km) and altitude error (in meters) parameters respectively. These values represent the estimated error in source parameters with respect to the “known” solution or are based on the errors reported by the source author.

Event source and status level are used to classify events in this database:

Events source includes the following 6 types:

Bulletin event

Explosion

Meteorological

Mining

Rocket launch

Rocket re-entry

Unknown

Status levels indicate the type of analysis that has gone into building the events:

Reviewed, event is based on the review of infrasound waveforms (not necessarily TA waveforms)

Observed, event is documented but no infrasound review has been performed

Not Verified, the event is not verified

The infrasound waveform data for all events contained in this database are available via the standard IRISDMC data request tools, using the following information:

Event Date and Time: from the event page

Network: TA

Stations: list can be downloaded via the Download Station List button under Product Download at the bottom of each event page

Record sections of the BDF channel data for each event are displayed on the corresponding event page that are accessible via IRIS’s Searchable Product Depository (SPUD). Each event page also displays event information, record sections of seismic BHZ, BHN and BHE channels, other associated solutions, maps, links and references. To emphasize the potential infrasound signals, the infrasound record sections include both normalized and non-normalized traces. The seismic record sections (BHZ, BHN and BHE channels) are all normalized to bring out the potential infrasound signals. As a visual guide, estimated seismic and infrasound arrival time are also marked on the sections.